If you understand the hibernate mechanism clearly, it doesn’t execute the SQL statements directly to manipulate the database, hibernate itself a state maintaining mechanism.
Hibernate just holds the state of the new object, loaded object and updated object.
Hi all, I am new user of hibernate, and getting confused with the working of save Or Update().
I have read that save Or Update() will update the table entry if there is a record present for that ID, and if the id is not present then it simply insert the record. I have a Role Table like Role_id | Role_Name | Create_Time | Create_User | Update_Time | Update_USer1 Admin At null nullnow when from the UI when an update is happen, I just use this, they are set to null.
The only thing that seems a little confusing is that the rolename is unchanged. Do you think Hibernate has to show the statement in it' logs? , update_user......means it is updating all the things, while it should only update the update_time=? Calling save Or Update() with a detached instance simply assumes that all properties has been modified since Hibernate doesn't know the initial state.
Then you have to set the right property in your xml, set show_sql to you are right in terms of save Or Update() is doing something, but not according to my knowledge on that,and role Name is not changed because from the UI i am getting its value and it is common for adding a role or updating a role. , update_userand if the value of create_user and create time is filled previously then update query generated is like what i have posted in previous post.. Using the select-before-update option will not help, since it is only used to confirm that at least a few values has been changed.
Hibernate Session is the interface between java application and hibernate framework.
Today we will look into Session important methods for saving and updating data in tables – save, save Or Update, persist, update and merge.
The methods which you are using are for updating its states and ultimately updated in database after the unit of work is completed. If you want to receive the future articles on hibernate, please subscribe here. That means it insert an entry if the identifier doesn’t exist, else it will throw error.
If the primary key already present in the table, it cannot be inserted.
Now to make things even more strange when I try to insert some dummy manually I can do it, and ...
Hello, I've got a problem with save Or Update not saving anything, and the logs aren't telling me much.
It must be save explicitly after attaching it to a valid hibernate session. )] INFO Abstract Batch Impl:208 - HHH000010: On release of batch it still contained JDBC statements public class No Save Call For Persistent Entity Output: Hibernate: insert into Employee (FIRST_NAME, LAST_NAME, ID) values (?